Example 1: A certain project involves the construction of an existing building starting from the 8th floor.
The engineering part is a shear wall made of C40 concrete.
After demoulding, vertical cracks were found on the wall surface, which were very regular.
There were vertical cracks every 1.
5m to 1.
8m, with sharp ends and a wide middle.
The widest part was about 0.
2mm to 0.
3mm.
Some cracks are through cracks.
The concrete strength can reach around C45.
.